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| Criterion |  Agile NoEstimates |  DevOps Blameless Postmortem |  Operations Root Cause Analysis |  Operations Root Cause Tree Analysis |
|---|---|---|---|---|
Purposedifferent | When estimating slows a team down more than it helps, it shifts the focus to flow, small slices, and real lead time. It sorts work by value, risk, and delivery ability. The result is captured as Throughput Data, Flow Forecast, and Slicing Rules. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | laufend | 30-90 min | 1-4 h | 1-3 h |
Participantsdifferent | 2-12 | 3-12 | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Throughput Data, Flow Forecast, Slicing Rules | Postmortem Doc, Action Items, Timeline | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | EstimationForecastingFlow | Site Reliability EngineeringIncidentLearningReliability | Root causeProblem solvingQualityIncident | Root causeTreeIncidentQuality |